5/6+13/42+15/56,用简便运算
问题描述:
5/6+13/42+15/56,用简便运算
答
5/6+13/42+15/56=140/168+52/168+45/168=(140+52+45)/168=237/168
答
5/6+13/42+15/56,
=(35+13)/42+15/56
=48/42+15/56
=8/7+15/56
=(64+15)/56
=79/56